# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0

#
# This template demonstrates how to configure Amazon Route53 Application Recovery Controller Readiness Checks
# For a full description of how it works, please read
# https://aws.amazon.com/fr/blogs/aws/amazon-route-53-application-recovery-controller/
#

AWSTemplateFormatVersion: '2010-09-09'
Description: 'This template creates an Amazon Route53 Application Recovery Controller Readiness Check for the DynamoDB five-9s app'
Parameters:
  Region1:
    Default: us-east-1
    Description: The region for the first cell
    Type: String 

  Region2:
    Default: us-west-2
    Description: The region for the second cell
    Type: String 

  Stage1: 
    Description: The ARN of the API Gateway stage in cell 1
    Type: String 

  Stage2: 
    Description: The ARN of the API Gateway stage in cell 2
    Type: String 

  FnRead1: 
    Description: The ARN of the read function in cell 1
    Type: String 

  FnRead2: 
    Description: The ARN of the read function in cell 2
    Type: String 

  FnWrite1: 
    Description: The ARN of the write function in cell 1
    Type: String 

  FnWrite2: 
    Description: The ARN of the write function in cell 2
    Type: String 

  DynamoDBTableCustomer:
    Description: The ARN of the DynamoDB Global Table for customers
    Type: String 
  DynamoDBTableProduct:
    Description: The ARN of the DynamoDB Global Table for products
    Type: String 
  DynamoDBTableOrder:
    Description: The ARN of the DynamoDB Global Table for orders
    Type: String 

  ProjectId:
    AllowedPattern: '[a-zA-Z][a-zA-Z0-9]*'
    ConstraintDescription: Must begin with a letter and contain only alphanumeric
      characters.
    Default: Dynamo59
    Description: The name of the project
    MaxLength: '64'
    MinLength: '1'
    Type: String

Resources:

#
# The Application Recovery Controller cells
#
  Cell1:
    Type: AWS::Route53RecoveryReadiness::Cell
    Properties:
      CellName: !Sub ${ProjectId}-Cell1-${Region1}

  Cell2:
    Type: AWS::Route53RecoveryReadiness::Cell
    Properties:
      CellName: !Sub ${ProjectId}-Cell2-${Region2}

#
# The Application Recovery Controller recovery groups
#
  RecoveryGroup:
    Type: AWS::Route53RecoveryReadiness::RecoveryGroup
    Properties:
      RecoveryGroupName: !Sub ${ProjectId}-RecoveryGroup
      Cells: 
        - !GetAtt Cell1.CellArn
        - !GetAtt Cell2.CellArn

#
# The Application Recovery Controller resource set
#

# the API Gateway stages
  ResourceSetAPIGW:
    Type: AWS::Route53RecoveryReadiness::ResourceSet
    Properties:
        ResourceSetName: !Sub ${ProjectId}-ResourceSet-APIGW
        Resources: 
          - ResourceArn: !Ref Stage1
            ReadinessScopes:
              - !GetAtt Cell1.CellArn        
          - ResourceArn: !Ref Stage2
            ReadinessScopes:
              - !GetAtt Cell2.CellArn        
        
        ResourceSetType: AWS::ApiGateway::Stage

# the Lambda functions
  ResourceSetLambda:
    Type: AWS::Route53RecoveryReadiness::ResourceSet
    Properties:
        ResourceSetName: !Sub ${ProjectId}-ResourceSet-Lambda
        Resources: 
          - ResourceArn: !Ref FnRead1
            ReadinessScopes:
              - !GetAtt Cell1.CellArn        
          - ResourceArn: !Ref FnRead2
            ReadinessScopes:
              - !GetAtt Cell2.CellArn        
          - ResourceArn: !Ref FnWrite1
            ReadinessScopes:
              - !GetAtt Cell1.CellArn        
          - ResourceArn: !Ref FnWrite2
            ReadinessScopes:
              - !GetAtt Cell2.CellArn        
        
        ResourceSetType: AWS::Lambda::Function

# the DynamoDB tables
  ResourceSetDynamoDB:
    Type: AWS::Route53RecoveryReadiness::ResourceSet
    Properties:
        ResourceSetName: !Sub ${ProjectId}-ResourceSet-DDB
        Resources: 
          - ResourceArn: !Ref DynamoDBTableCustomer
            ReadinessScopes:
              - !GetAtt Cell1.CellArn        
          - ResourceArn: !Ref DynamoDBTableProduct
            ReadinessScopes:
              - !GetAtt Cell1.CellArn        
          - ResourceArn: !Ref DynamoDBTableOrder
            ReadinessScopes:
              - !GetAtt Cell1.CellArn        
        
        ResourceSetType: AWS::DynamoDB::Table

#
# The Application Recovery Controller readiness checks
#

# the APIGW stages
  ReadinessCheckAPIGW:
    Type: AWS::Route53RecoveryReadiness::ReadinessCheck
    Properties:
      ReadinessCheckName: !Sub ${ProjectId}-ReadinessCheck-APIGW
      ResourceSetName: !Ref ResourceSetAPIGW

# the lambda functions
  ReadinessCheckLambda:
    Type: AWS::Route53RecoveryReadiness::ReadinessCheck
    Properties:
      ReadinessCheckName: !Sub ${ProjectId}-ReadinessCheck-Lambda
      ResourceSetName: !Ref ResourceSetLambda

# the DynamoDB table
  ReadinessCheckDynamoDB:
    Type: AWS::Route53RecoveryReadiness::ReadinessCheck
    Properties:
      ReadinessCheckName: !Sub ${ProjectId}-ReadinessCheck-DynamoDB
      ResourceSetName: !Ref ResourceSetDynamoDB